EP0240915A1 - Process for the manufacture of accumulators with groups of electrodes, and accumulator manufactured according to this process - Google Patents

Abstract

In a method of manufacturing accumulator plate sets separator sheets (15) consisting of glass fleece are cut to size and are adhesively bonded to form pockets after being folded around a positive grid plate laid thereon. A predetermined compressive stress is maintained in the plate set (18) by bands (21) placed around it, whereupon the plate sets are then inserted into an accumulator housing (20).

Description

The invention relates to a method for producing accumulators with an accumulator housing and accumulator plate sets arranged therein with alternating positive and negative plates separated by a separator material, in which a separator sheet is formed in each case to form pockets at least around one type of plate, preferably the positive plates folded around and at least the side edges adjacent to the folding edge are firmly connected to one another, whereupon the pocketed plates and the possibly not pocketed plates are stacked into plate sets and placed in an accumulator housing, after which the intercell welding and the closure of the accumulator housing take place.

With such a method (DE-OS 33 04 257), the positive plate is pocketed in pockets made of separator material for the purpose of avoiding short-circuits at the bottom of the plate set when the positive sludge settles. After pasting the negative and positive plates and formation the positive plates are pocketed by the fact that a separator belt roll runs a web which is twice as wide as the positive plates and is folded by suitable deflection devices in such a way that a an open pocket of any length is created, into which the plates are inserted at fixed intervals. The folded separator belt provided with the inserted positive plates then passes through a welding station, the individual individual pockets being formed by welding the two pocket halves in the region of the side edges of the inserted plates. The individual pockets are then finally formed by cutting the folded band in the region of the side edge welds.

In the known method, weldable but nevertheless permeable plastic films must be used for the separator belt. The separator strip material can therefore not only be selected according to the criteria for an inexpensive separator material, but must also have the properties necessary for realizing a tight and tight weld. In general, such separator belts are very thin and require special measures on the plate sets in order to ensure a predetermined spacing of the plates which have been folded into plate sets. The need to continuously deform the separator belt on the moving belt with a fold running in its longitudinal direction to the initially continuous pocket also limits the number of materials that can be used. The longitudinal folding on the moving belt leads to considerable stresses on the belt material, for which purpose a certain minimum strength is required, which is not present in particular with very absorbent belt materials that are particularly suitable for separator purposes.

In another known method (DE-AS 12 52 292), positive and negative plates are alternately on one band-shaped separator material is placed on which an additional band of separator material is placed on this arrangement and a weld is carried out in the region of the side edges of the plates. The plate set is then made by folding this arrangement. In these known methods, the bottoms of the pockets are open, so that the positive plates are not actually pocketed. In this known method, too, the choice for the separator material is considerably restricted.

Another known method (US-PS 40 63 978) works with individual separator sheets of double height as the plates to be pocketed, wherein the separator tape is folded around the plates from below and then welded on the edge. In this known method, too, a thermoplastic separator material must be used, which becomes sticky when heated.

Finally, it is already known (US Pat. No. 4,509,252) to place two sets of frames, which are composed of positive and negative plates, before being inserted into the cell housing, which are arranged at a vertical spacing and which only cover the side and end walls, but not the top and bottom of the plate set include.

The aim of the invention is to provide a method of the type mentioned, in which selected material can only be used for the separator sheets according to optimal electrochemical properties, such as electrolyte uptake and spacing, and by which a predetermined compressive stress inside the plate sets in Direction perpendicular to the plate levels is guaranteed.

To achieve this object, the invention provides for separator sheets consisting of glass fleece to be cut to slightly more than the single or double surface of the plates to be pocketed and to be provided with a sulfuric acid-resistant glass fleece plastic at least along the side edges and preferably also along the top edges and if necessary the bottom edges , whereupon the plates are arranged between each two separator sheets and the edges of the separator sheets protruding over the plates are pressed together and possibly cut through until the adhesive has hardened, and that the stacked plate sets are set perpendicular to the plate plane under a predetermined plate set pressure and this plate set pressure is maintained at least as long as by means of a voltage applied to the plate set of clamping device until the plate set is located in the _a kkumulatorgehäuse, in which case the plate target pressure by fixed abutment of the end sides of the plate set it is maintained on fixed parts of the battery housing.

According to the invention, separator sheets made of elastically compressible glass fleece are used, which is expediently a microglass fleece with an average glass fiber diameter of 0.5 to 5 and in particular about 0.7 μm and a maximum pore size of 0.1 to 40, in particular about 1 μm. Furthermore, the glass fleece used should have a thickness of 0.5 to 3 and in particular approximately 2 mm before the plate set is pressed together.

Such a very absorbent and relatively voluminous glass fleece can absorb a considerable volume of acid and is at the same time suitable for ensuring a defined distance between the individual plates in connection with the compressive stress applied from the outside. The use of the generally non-weldable glass fleece is made possible by the fact that the pocket-complete connection of the side edges and possibly the upper edge of the folded separator sheets is ensured by gluing. The choice of the separator material is thus independent of properties that enable welding. Of particular importance is the maintenance of a predetermined and constant pressure preload from plate set to plate set perpendicular to the elastic plate planes, because in this way the degree of / compression of the glass fleece separator belts is set exactly perpendicular to their plane, so that all accumulators produced according to this method are the same have electrical properties. The low tensile strength of a glass nonwoven compared to the compressive strength does not prove to be an obstacle because of the process according to the invention. Due to the manner of manufacturing plate sets according to the invention, manufacturing-related tolerances in the plate thicknesses can also be easily compensated for, since the same pressure is now always exerted on the plate sets.

The tensioning device preferably consists of at least one sulfuric acid-resistant band wrapped around the plate set. Advantageously, at least two bands are looped around the plate set at a lateral distance.

In order to achieve a vibration-proof arrangement for the individual packaged plates at the same time, it should also be provided that the bands are wrapped around the end faces and the top and bottom sides of the plate set. In this way, in particular vertical _V ER- shifts of the plates relative to each other effectively avoided when shaken. The arrangement of the belts in question also has the advantage that they also extend over the bottom of the plate set and reinforce the folds there, which are very important for trapping the positive sludge which settles out.

Since the application of a predetermined compressive prestress to the plate sets can vary their length perpendicular to the plate planes due to the usual manufacturing tolerances of the plates and the separator strip material, it should be provided according to a further advantageous embodiment that the plate set are brought to a constant length determined by the interior of the accumulator housing before placing them in the accumulator by arranging shim foils or plates.

and / or porous The insert films consist primarily of a smooth, / sulfuric acid-resistant plastic such as PVC. In principle, in addition to plastic plates, glass fleece plates could also be used as shims to compensate for larger tolerances.

In order to protect in particular the folding of the individual pockets located on the underside of the plate set against damage and strengthen a further embodiment designed so that the plate set has two axially outer Beilagfolien or plates, the bottom by a -Platte _B odenfolie- or a U-shaped outer cover sheet or plate are united, which is wrapped around the outside by the tapes. In this case, a U-shaped cover sheet or plate is placed around the entire plate pack. The straps fixing the compressive pretension are then wrapped around this arrangement.

The adhesive bonding of the side edges of the separator sheets results in an arrangement of adhesive strips projecting, for example, 5 mm beyond the side edges of the plates, which comes into engagement with the inner wall of the housing when the plate sets are inserted into the accumulator housing, as a result of which an elastic and resilient lateral support of the plate sets in the housing is guaranteed. Since these protruding adhesive strips can be deformed relatively easily by compression and lateral bending, this is also the case A considerable tolerance compensation is guaranteed in the lateral direction of the plate sets.

It is of particular importance that an adhesive is used which essentially only penetrates into the glass fleece perpendicular to the application surface, but is not sucked into the glass fleece parallel to the surface. The adhesive used should therefore form an intimate connection with the glass fleece material where it is applied, but should not be able to be drawn into the flat surfaces of the separator belts, which are important for the separator effect, due to capillary forces.

It is also expedient if an adhesive is used, but is still kept flexible, which stiffens the bonded glass fleece / and does not remove its porosity even at the points it impacts. In this way, the protruding adhesive strips of the separator tapes still retain sufficient absorption capacity for the sulfuric acid.

According to a first practical embodiment, an aqueous dispersion of vinyl ester copolymers is used as the adhesive.

Another possibility is that a hot-melt adhesive which is resistant to sulfuric acid and which is preferably highly tixotropic is used as the adhesive. A hot melt adhesive has the advantage that it can harden very quickly if necessary or the degree of hardness can be set in a precisely defined manner.

, daß zwei laufende Bahnen von Glasvlies verwendet werden, wobei die erste Bahn über den Auflegetisch geführt ist und nur geringfügig breiter ist,als die Platten hoch sind. Über diese erste Bahn wird dann eien zweite Glasvlies- Bahn geführt, und nach dem Aufbringen des Klebstoffes werden die Bahnen unter Einschluß der Platten aufeinandergelegt und miteinander verklebt. Der Anpreßvorgang könnte dann zweckmäßigerweise mit dem Auseinanderschneiden der einzelnen Plattentaschen kombiniert werden.It is possible to pre-insert the panels

that two running sheets of glass fleece are used, the first sheet being guided over the lay-up table and being only slightly wider than the panels are high. A second glass fleece web is then passed over this first web, and after the adhesive has been applied, the webs are placed on top of one another, including the plates, and glued together. The pressing process could then advantageously be combined with the cutting apart of the individual plate pockets.

It is also possible in this way to use two sheets of glass fleece of slightly more than twice the height of the plates and at the same time to pocket two plates between the two sheets of glass fleece guided one above the other. By cutting, double pockets can be created, the two halves of which are then folded around an interposed negative electrode plate. In this way, a very high pocket speed can be achieved.

However, it is preferred if the separator sheets consisting of glass fleece are cut to slightly more than twice the area of the plates to be pocketed and are provided along the side edges and preferably also along the top edges with a sulfuric acid-resistant glass fleece adhesive, whereupon the separator leaves are folded around the plates and the edges coming to lie on one another are pressed onto one another until the adhesive has hardened, the folding edge preferably also being provided with a stiffening adhesive which is resistant to sulfuric acid. In this way, the folding edge is made much more resistant to the cutting-like effect of the pocketed panels by the stiffening adhesive.

Since the glass fleece used for the separator tapes is not particularly resistant to the knife-like effect of the pocketed plates, it is expedient if the folding edge is also provided with a sulfuric acid-resistant stiffening adhesive.

The adhesive here only has a stiffening effect and prevents the folding edge, which is on the bottom of the battery housing, from being mechanically damaged or destroyed, which could lead to short circuits within the set of plates.

The areas of the glass fleece tapes lying between the positive and negative plates are protected by the firm pressing in between the plates so that the mechanical resistance, which is low in itself, is not a disadvantage here. In other words, the glass fleece tape is stabilized by being pressed between two electrode plates. The areas of the glass fleece tapes that protrude laterally or below are preferably stiffened by the applied adhesive and thus mechanically consolidated.

In terms of production, it is particularly simple if the stiffening adhesive is applied together with the plastic that bonds the other edges before folding and is preferably of the same type as the plastic that bonds the other edges.

However, it is also possible for the stiffening adhesive to be applied from the outside to the underside thereof after the plate sets have been formed.

Finally, a further embodiment provides that the stiffening adhesive is applied to the underside of the plate set after the nominal plate pressure has been generated and preferably before the strips have been applied. In order to take into account the fact that the pockets of the positive plates protrude further below than the negative plates, a practical embodiment of the method according to the invention is selected such that a plate made of a melting stiffening adhesive is profiled onto the underside in accordance with the arrangement of pocketed positive plates and negative plates in between of the plate set is applied and connected to the folds of the separator sheets by heating.

In principle, it is possible that the pressure preload in the plate sets, which is initially maintained by the bands, is maintained by the end walls of the battery housing after being fitted precisely into the battery housing. This is also expedient because the belts only exert pressure along their contact surface on the plate set, while under certain circumstances bulges of the plates or the separator belts are possible. If the end walls of the accumulator housing maintain the pressure preload, the straps could well be designed so that they dissolve in the accumulator acid or at least lose their tension.

However, the tapes preferably consist of an acid-resistant polycarbonate film, which maintains their preset tensile stresses even over long operating times within sulfuric acid. This is advantageous because the parts of the strips extending over the top of the plate set also determine the vibration resistance there.

The invention also relates to an accumulator produced by the method according to the invention and a device for carrying out the method according to claims 20 to 23.

• Fig. 1 eine schematische perspektivische Ansicht einer Vorrichtung zur Ausführung eines Verfahrens zum Herstellen von eingetaschten positiven Platten,
• Fig. 2 eine schematische Seitenansicht einer Vorrichtung zur Weiterverarbeitung der in der Vorrichtung nach Fig. 1 hergestellten eingetaschten positiven Platten,
• Fig. 3 eine schematische perspektivische Ansicht eines nach dem Verfahren gemäß der Erfindung hergestellten Akkumulatorplattensatzes unmittelbar vor dem Einsetzen in ein ebenfalls dargestelltes Akkumulatorengehäuse, wobei der Anschaulichkeit halber die Dicke der nicht eingetaschten negativen Platten etwas übertrieben dargestellt ist, um zeichnerisch zwischen benachbarten Taschen einen tatsächlich kaum vorhandenen Abstand in Erscheinung treten zu lassen,
• Fig. 4 einen Schnitt nach Linie IV-IV in Fig. 3, bei in das Akkumulatorengehäuse eingesetztem Akkumulatorenplattensatz und
• Fig. 5 schematisch den Ausschnitt V in Fig. 4 in vergrößertem Maßstab zur Veranschaulichung eines bevorzugten Verfahrens zum Versteifen der Taschenfalten.

The invention is described below, for example with reference to the drawing; in this shows:

• 1 is a schematic perspective view of an apparatus for carrying out a method for producing pocketed positive plates,
• 2 shows a schematic side view of a device for further processing the pocketed positive plates produced in the device according to FIG. 1,
• Fig. 3 is a schematic perspective view of a battery plate set produced by the method according to the invention immediately before insertion into a battery housing, also shown, for the sake of clarity, the thickness of the non-pocketed negative plates is shown somewhat exaggerated to actually hardly be drawn between adjacent pockets allow the existing distance to appear
• Fig. 4 is a section along line IV-IV in Fig. 3, in the battery case inserted in the battery plate set and
• Fig. 5 schematically shows the detail V in Fig. 4 on an enlarged scale to illustrate a preferred method for stiffening the pocket folds.

1, a glass nonwoven web 36 is drawn in from a supply roll 37 by a pair of take-off rolls 38 via an infeed table 39. The width of the web 36 is slightly larger than twice the height of the positive battery plates 16 to be pocketed.
^* ) where the rollers 37 and 38 are driven, for example. The infeed table 39 is formed by deflection rollers in conjunction with _V orzugsrollenpaaren which feed the glass non-woven sheet 36 to the _A bzugsrollenpaar 38th The sagging loop 40 formed between the deflection rollers or pairs of preferred rollers has the purpose of not subjecting the glass nonwoven web 36 to tensile stress and also of preventing material upsets from occurring in the subsequent process steps.

Following the pair of pull-off rollers, the device according to the invention aligned with the right half of the pair of pull-off rollers 38 has a conveyor belt 41 which has a width slightly greater than the height of the plates 16.

In addition to the conveyor belt 41, there is a support plane (not shown) parallel to it, on which the areas of the separator sheets 15 that do not rest on the conveyor belt 41 come to rest.

Between the pair of take-off rollers 38 and the beginning of the conveyor belt 41 there is a cross-cutting knife 42, by means of which the supplied glass fleece web 36 is cut into individual separator sheets 15, the dimensions of which in the transport direction f are somewhat larger than the width of the plate 16.

Immediately at the beginning of the conveyor belt 41 is a plate laying station 19, within each of which a positive grid plate 16 delivered laterally from a plate magazine, not shown, with a connecting tab 43 to the one located on the conveyor belt 41 Half of the separator sheet 15 is placed, the connecting tab 43 protruding beyond the upper edge 14 facing away from the other half of the separator sheet 15.

An electronic length measurement stops the puller roller pair 38 when the previously set glass fleece pocket width is reached. With a swivel arm (not shown), a lead accumulator plate 16 is removed from the plate magazine with vacuum suction devices attached to the side of the conveyor belt 41 and centered on one half of the separator sheet 15 made of glass fleece.

The separator sheet 15 with the plate 16 arranged thereon is then conveyed from the conveyor belt 41 to the subsequent gluing station 24, where an adhesive consisting of an aqueous dispersion of vinyl ester copolymers is applied to the side edges 12, 13 protruding from the plate 16 and the upper edge 14 by means of glue application nozzles. As a result, thin layers of adhesive 17 or a stiffening adhesive 23 are applied all around on the half of each separator sheet 15 carrying the plate 16. The stiffening adhesive 23 can in principle consist of the same material as the adhesive 17 intended for the other edges; However, since the stiffening adhesive 23 is applied in the area of the folding edge 11 formed in the subsequent folding station 25, where no gluing but only stiffening is to be carried out, the stiffening adhesive is preferably one which is primarily for stiffening and stabilization of the folding edge 11 is suitable.

In the folding station, the folding edge or the folding edge 11 of the separator sheet 15 is pre-folded by means of the plate 16.

From the folding station 25, in which the half of the separator sheet 15 which is not occupied by the plate 16 is turned upwards in the manner shown in FIG. 1 to form the folding edge 11 and finally struck on the plate 16, the arrangement which is now already in the form of a pocket arrives from the separator sheet 15 and the plate 16 enclosed therein to a pressure station 26, where from above a U-shaped frame 45, which has a cutout 46 for the connecting lug 43, is pressed from above onto the side edges 12, 13 and the upper edge 14, whereby the edges that lie on top of each other are pressed against each other with the layer of glue in between until the adhesive has set.

Finally, at the end of the conveyor belt 41, there are the fully pocketed positive plates 16, which are then introduced from the conveyor belt 41 into the plate stacking station 27 indicated schematically in FIG. 2, where the pocketed positive plates 16 are placed alternately with non-pocketed negative plates 16 ' in order to create an accumulator plate set 18 which emerges from the plate stacking station 27 according to FIG. 2. 2, plate set 18 then arrives at a test station 28, where it is examined whether the correct number of pocketed and unbagged positive and negative plates is in the correct arrangement.

The plate sets 18 are then conveyed further into a pressure generating station 29, where a predetermined compressive stress is applied perpendicularly to the plane of the plate on the two pocketed positive plates arranged at the ends of the plate set 18, so that the entire plate set is continuously under a predetermined axial compressive stress. The plate sets 18 thus pressurized are then conveyed to a thickness measuring station 30, where the thickness of the plate set is measured perpendicular to the plane of the plate. In a subsequent insert foil or plate arrangement station 31 are then on one or both end faces of the plate set 18 insert sheets 22 or insert plates in the required thickness and number, whereby the plate set 18 are brought to a predetermined length at the preset pressure.

The plate sets 18 are then conveyed further into a banding station 32, where the plate sets according to FIG. 3, which are now under a certain pressure preload and have a specific thickness, are enclosed by bands 21 which are resistant to sulfuric acid and which are tensioned such that the pressure preload which has been preset in the plate set 18 is maintained by the bands 21.

According to FIG. 3, there is now a plate set 18 of a predetermined length that can be handled without any problems, the plates and glass fleece separator sheets 15 located between them are continuously under the predetermined pressure preload. In Fig. 3, a clear distance in the direction of the longitudinal extension of the plate set 18 can be seen between the adjacent separator blades 15, but this is only simulated with an exaggerated thickness due to the representation of the negative electrodes. In reality, the electrode plates are so thin and the separator sheets are so voluminous that the edges of adjacent pockets sticking over the plates touch each other.

2 are now conveyed into an electrical test station 33, where a test for sufficient electrical insulation of the plates from one another is carried out by applying to a high-voltage source.

Finally, the tested disk sets 18 reach a _A kkugehäusebeschickungsstation 34, where the plate sets 18 3 schematically indicated by an arrow F manner be inserted into an exact match to accumulators housing 20 or in a single cell of such storage batteries housing from above by means of feeding cassettes in the of FIG. . Since the plate set 18 due to the measures according to a predetermined length, it fits so precisely into the interior of the battery housing 20 that a defined pressure is exerted on the opposite end faces of the set by the end walls 47 of the battery housing 20, which supports the action of the straps 21.

_F ig. 4 shows the final construction of the battery housing achieved by the measures according to the invention immediately before the intercell welding, which is preferably carried out using the COS method. Finally, the accumulator is closed in the usual way.

3, the battery plate set 18 according to the invention has the connecting lugs 43 of the positive plate 16 on one side at the top and the connecting lug 56 of the non-pocketed negative plates 16 'on the opposite side.

Optionally, a hot melt adhesive application station 35 can be provided between the stations 31 and 32 according to FIG. 2, where, according to FIG. 5, a profiled plate consisting of a stiffening hot melt adhesive 23 is applied from below to the plate set 18, the cross section of which is the lower surface of the plate set 18 corresponds. This hot-melt adhesive plate 23 is profiled in such a way that strip-shaped or rib-like projections 48 project upwards between the folding edges 11 of the positive plates to the lower edges of the negative plates 16 '. By heating the hot-melt adhesive, an intimate connection with the glass fleece material and possibly also the lower edge of the negative plates 16 'is brought about.

4 and 5, the outermost of the shim foils 22 provided on the end faces of the plate set 18 are connected at the bottom by a cover foil 22 'to form a U-shaped overall cover, as a result of which the underside of the plate set 18 is additionally protected against mechanical damage.

For the inventive method and the accumulator out of this _V produced particularly g _u t negative electrodes made of copper expanded metal suitable because in this case the resulting inside the plate sets heat is dissipated particularly well to the poles. Of particular importance for the present invention are negative electrodes and also positive armor plates, as are described in the simultaneously filed patent application "negative electrode for lead accumulators" (our symbol H 2287; official file number P).

Claims (10)

1. A method for producing accumulators with an accumulator housing and accumulator plate sets arranged therein with alternately positive and negative plates separated by a separator material, in which a separator sheet is folded around at least one type of plates, preferably the positive plates, to form pockets at least the side edges adjoining the folding edge are firmly connected to one another, whereupon the pocketed plates and the possibly not pocketed plates are stacked into plate sets and placed in an accumulator housing, after which the intercell welding and the closure of the accumulator housing take place, characterized in that the microporous Glass fleece existing separator sheets (15) cut to slightly more than the single or double surface of the plates (16) to be pocketed and at least along the side edges (12, 13) and preferably also along the upper edges (14) and if necessary, the lower edges are provided with a sulfuric acid-resistant glass fleece adhesive (17), whereupon the plates (16) are arranged between two separator sheets as well as the edges (12, 13, 14) of the projecting over the plates (16) which lie one on top of the other Separator sheets are pressed together and, if necessary, cut through until the adhesive (17) has hardened and that the stacked plate sets (18) set perpendicular to the plate plane under a predetermined plate target pressure and this plate target pressure is maintained at least until the plate set (18) is in the accumulator housing (20) by a clamping device (21) applied to the plate set, in which case the plate target pressure is achieved by firmly abutting the end faces of the Plate set (18) is maintained on fixed parts of the battery housing (20), the tensioning device in particular consisting of at least one sulfuric acid-resistant band (21) wrapped around the plate set (18) and expediently also at least two bands (21) at a lateral distance around the Plate set (18). are wrapped around. 2. The method according to claim 1, characterized in that the tapes are wrapped around the end faces and upper and lower sides of the plate set (18). 3. The method according to claim 1 or 2, characterized in that the plate set (18) before being introduced into the battery housing (20) by arranging shims or plates (22) to a constant length determined by the interior of the battery housing (20) are brought, wherein preferably the plate set (18) has two axially outer shims or plates (22), which are combined below by a bottom film or plate (22 ') to form a U-shaped outer cover film or plate, the outside is wrapped by the tapes (21) and / or the side sheets or plates (22, 22 ') expediently consist of a smooth and / or porous sulfuric acid-resistant plastic such as PVC. 4. The method according to any one of the preceding claims, characterized in that an adhesive (17) is used, which at least partially penetrates into the glass fleece essentially only perpendicular to the application surface, but is not sucked into the glass fleece parallel to the surface and / or that a Adhesive (17) is used, which stiffens the bonded glass fleece and does not remove its porosity even at the points it impinges on, preferably as an adhesive (17) an aqueous dispersion of vinyl ester copolymers or a sulfuric acid-resistant hot melt adhesive, which is preferably highly tixotropic. 5. The method according to any one of the preceding claims, characterized in that the separator sheets (15) made of glass fleece are cut to slightly more than twice the area of the plates (16) to be pocketed and along the side edges (12, 13) and preferably also along the top edges (14) are provided with a sulfuric acid-resistant glass fleece adhesive (17), whereupon the separator sheets (15) are folded around the plates (16) and the edges (12, 13, 14) that lie one on top of the other are pressed together until the adhesive (17 ) is cured, the folding edge (11) preferably also being provided with a sulfuric acid-resistant stiffening adhesive (23), the stiffening adhesive (23) expediently together with the adhesive (17) gluing the other edges (12, 13, 14) before folding is applied and is preferably of the same type as the adhesive (17) gluing the other edges (12, 13, 14) or the stiffening adhesive (23) after Forming the plate sets (18) is applied from the outside to the underside thereof, expediently such that the stiffening adhesive (23) is applied to the underside of the plate set (18) after the desired plate pressure has been generated and preferably before the strips (21) are attached A plate (23 ') made of a melting stiffening adhesive (23) and profiled according to the arrangement of pocketed positive plates and negative plates (16, 16') in between is applied to the underside of the plate set (18) and by heating with the folds of the separator sheets (15) is connected. 6. The method according to any one of the preceding claims, characterized in that the glass fleece is a microglass fleece with an average glass fiber diameter of 0.5 to 5 and in particular about 0.7 µ and a maximum pore size of 0.1 to 40, in particular about 1 u . 7. The method according to any one of the preceding claims, characterized in that the glass fleece has a thickness of 1 to 3 and in particular about 2 mm before compressing the plate set (18). 8. The method according to any one of the preceding claims, characterized in that the strips (21) consist of an acid-resistant plastic film, in particular a polycarbonate film. 9. An accumulator produced by the method according to any one of the preceding claims, wherein in particular the positive plates (16) are accommodated in pockets made of glass fleece by gluing together, in particular by folding separator sheets (15), with glued edges and made of alternating negative and positive plates (16, 16 ') and possibly insert sheets or plates (22) formed plate sets (18) of predetermined length are held by the folded bands (21) under a predetermined compressive stress in the direction perpendicular to the plate surface. 10. Device for producing batteries according to claim 9 according to the method according to one of claims 1 to 8, characterized by a plate laying station (19), a subsequent gluing station (24), a subsequent folding station (25), a subsequent pressure station (26 ), a plate stacking station (27), preferably a test station for checking whether the plates (16, 16 ') are properly pocketed or not and the correct number of positive and negative plates (16, 16') are present, a pressure generating station ( 29) for applying a predetermined pressure to the plate sets perpendicular to the plate surface, a thickness measuring station (30) for measuring the thickness of the plate set (18) thus pressurized, a shim or plate arrangement station (31) in which the plate sets (18) pass through Adding of insert sheets or plates (22) to a predetermined length, a banding station (32) for wrapping the plate sets (18) with de n Tapes (21) for fixing the predetermined pressure preload in the plate sets (18), preferably an electrical test station (33) for checking the insulation quality and an accumulator housing loading station (34) for introducing the plate sets (18) of predetermined length and compressive preload into the accumulator housing (20) , in particular a hot melt adhesive application station (35) for applying hot melt adhesive to the underside of the plate set (18) is provided between the insert film or plate arrangement station (31) and the banding station (32).

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